Stuffing-box



*(NowModel.) y Y -W'. E. BROCKETT l STUPPING BOX.

No. 400,543. y .Patented Apr. 2, 1889.

j /ely ATTHNEYS.

i` UNITED STATES Pnrlnv'rv OFFICE.

NVILLIAM vELLSVVORTH BROCKETT, `OF BERLIN, WISCONSIN.

sTUFl-*lNe-Box.

SPECIFICATION formingpart of Letters Patent No. 400,543, dated April 2, 1889.

Application filed .Tune 9, 1888. Serial No. 276,588. (No model.)

To all whom, it may concern.'

Be it known that '1, WILLIAM ELLswoRTH BBOCKETT, of Berlin, county of Green Lake, and State of Wisconsin, have invented a new and Improved Stuffing-BOX, of -which the following is a full, clear, and exact description.

The object of the invention is toprovide a new and improved stuffing-box which is simple and durable in construction and permits a vibrating motion of the stem or rod passing .through the stuffing-box. I

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming apart of this specification,

. in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal sectional view of the improvement. Fig. 2 is an elevation of the casing. Fig. 3 is aplan of the same. Fig. 4 is a sectional view of a modiiied form of t-he improvement. Fig. 5 is an elevation of the casing of the same. Fig. 6 is an elevated plan of the same. Fig. 7 is a face view of the follower; Fig. 8, an elevation of the same. Fig. 9 is an elevation of the washer supporting the springs, and Fig. l0 is a face view of same.

The improved stuffing-box B is formed in the usual manner on the cylinder-head or steam-chest, and supporting on its outer end the gland C, through which passes loosely the piston-rod or valve-stem D. The inner end of the gland C is curved and lits on the correspondingly-shaped block E, resting on the follower F, fitting snugly on the valve-stern D, and held to slide in the cylindrical part G of the casing G, fitted loosely in the stuffingbox B. The cylindrical part G of the casing G continues into the cone-shaped opening G2, filled with the' packing H, against which presses the follower F. Against the inner end of the dhsing G presses a spring or springs, I, resting on a washer, J, held in the bottom or inner end of the stuffing-box.

For small engines I prefer the construction shown in Fig. l, in whicha single coil-spring, Z, is employed; but I may also use for larger engines a number of smaller springs, as shown in Fig. 4, instead of the large spring I. The

washer J may be provided with pins J fitting into corresponding apertures, G3, at the inner end of the casing G, so as to guide the latter in order to hold the springs I in place. The central opening in the gland C and block E is larger than the diameter of the stem or rod D, so that the latter passes freely through the saidparts. The washer J is similarly bored out; but the follower F and the inner end of the casing G fit snugly on the stem or rod D. The block E also fits into the open outer end of the stuffing-box B.

It will be seen that when the several part-s are in place, as shown in Figs. l and 4, the packing prevents the escape of steam along the stem or piston-rod D, and as the casing G is mounted yieldingly on the spring or springs Iit permits a vibrating motion of the said stem or rod D, thus preventing a breaking or bending of the said stem or parts of the stuffingbox. It will furtherbe seen that all wear on the packing His taken up by the spring or springs I, forcing the casing outward against the follower F, which is held in place by the block E and gland C. The steam which enters through the washer J into the interior of the offset cannot escape, as the block E fits into the open outer end of the stuffingbox B, and the follower F rests against the block E, thus cutting oif the escape of steam through the enlarged opening in the block E and gland C. In case the spring or springsl break, the gland C is screwed up, so that the block E, pressing against the follower F, forces the casing G onto the washer J, thus forming a solid stuffing-box, the flange on the block F. having been removed previously to permit the inward sliding motion of the said block in the stufing-box B.

l-Iaving thus fully described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with the stuiing-box having a rounding bottom or .inner end, of the washer rounded to t said'.` rounding bottom and to form a ball-joint therewith, and havi ing an aperture through whichy rod D loosely passes, the spring-seated casing G, closely fitting said rod at its inner end, and having the conical packing-receiving opening, cylindrical at its outer end, as shown at G', the follower F, snugly fitting the rod D and said cylindrical part G', the block E, through which the rod D loosely passes, and having a. reduced portion on its lower or inner face snugly fitting' the outer end of the stuiiing-box, and a rounding outer or upper face, and the gland C, bolted to the stuffing-box and having a concave inner end tting the rounding face of the block E, substantially as set forth.

2. The combination, with the stuiiing-box having its bottom or inner end rounded, of the Washer J, rounded on its lower face, provided With pins J on its upper face, and having a central aperture through which the rod D freely passes, the casing G, ztpertured at its lower end to snugly't the rod, apertured on its lower face to receive said pins,

and formed with thel conical packing-receiving opening cylindrical at its upper end, the spiral springs I, the follower F, snugly fitting the rod D and said cylindrical part of the packing-opening,the block E, through which the rod D loosely passes, provided with a reduced portion on its lower face snugly fitting the outer open end of the stuffing-box, and having a rounding outer or upper face, and the gland bolted to the stuing-box and having a conical inner end receiving the said rounding face, substantially as set forth.

WILLIAM ELLSWORTH BROCKETT. Witnesses:

J. W. LAUGHLIN, GEORGE OWENS. 

